And how much do you think the store makes when you "buy" six pairs and then return five of them, on their expense?

Unfortunately, the cheap jerks will go to the brick and mortar store, try things out, and then go online to buy from a store that can sell cheaper, because they don't have to factor in demo costs. And this is why there are so few brick and mortar stores left.

It's even worse. He bought three pairs with the intent of returning two of them to be destroyed, and other customers picking up the costs by paying more for everything to compensate for the losses.

I think you confuse deodorant, which masks the smell by adding a stronger smell, and antiperspirant, which reduces perspiration. The way I read the above poster was that you don't need deodorant, but can use unscented antiperspirant instead.